2001A&A...367..470G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST23:28:22

2001A&A...367..470G - Astronomy and Astrophysics, volume 367, 470-486 (2001/2-4)

X-ray variability in a complete sample of soft X-ray selected AGN.

GRUPE D., THOMAS H.-C. and BEUERMANN K.

Abstract (from CDS):

We present ROSAT All-Sky Survey and ROSAT pointed observations (PSPC and HRI) of a complete sample of 113 bright soft X-ray AGN selected from the ROSAT Bright Source Catalog. We compare these observations in order to search for extreme cases of flux and spectral X-ray variability - X-ray transient AGN. Three definite transients and one transient candidate are found. The other sources show amplitude variations typically by factors of 2-3 on timescales of years. We found that the variability strength on timescales of days is a function of the steepness of the X-ray spectrum: steeper X-ray objects show stronger variability than flat X-ray spectrum sources. We also present new HRI measurements of our extreme X-ray transients IC 3599 and WPVS 007. We discuss possible models to explain the X-ray transience and the variabilities observed in the non-transient sources.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - galaxies: active - galaxies: nuclei of - galaxies: Seyfert - quasars: general

CDS comments: misprint 1H 0419+577 instead of 1H 0419-577

Simbad objects: 118

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Number of rows : 118

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Mrk 335 Sy1 00 06 19.5371542746 +20 12 10.617456059   14.19 13.85     ~ 1093 0
2 ESO 242-8 Sy1 00 25 01.2569387883 -45 29 54.656924011   15.82 15.75 15.40   ~ 22 0
3 3XMM J003915.8-511701 Sy1 00 39 15.8341273306 -51 17 01.480962252   15.77 15.28 15.66   ~ 120 0
4 Ton S 180 Sy1 00 57 20.2038086128 -22 22 56.577563819   14.60 14.34 15.23   ~ 270 0
5 6dFGS gJ005837.4-360605 Sy1 00 58 37.3829859140 -36 06 04.950912106   14.9 14.90 15.0   ~ 80 0
6 2MASX J01002713-5113544 Sy1 01 00 27.0974105988 -51 13 54.100963840   16.48 15.4 15.17   ~ 45 0
7 2MASS J01053879-1416135 Sy1 01 05 38.7923334877 -14 16 13.579116767   13.6 15.51 15.17 14.43 ~ 29 1
8 2MASS J01173065-3826297 Sy1 01 17 30.6535169159 -38 26 29.718014711   18.26 16.5 17.25   ~ 17 0
9 2E 357 Sy1 01 19 35.6919706175 -28 21 31.421837195   18.13 16.3 16.58   ~ 48 0
10 MCG-03-04-072 Sy1 01 28 06.7201064277 -18 48 31.059816246   15 15.5     ~ 27 0
11 2MASX J01291051-2141572 Sy1 01 29 10.6819 -21 41 56.999   13.5 15.4 12.7   ~ 21 0
12 6dFGS gJ013416.9-425826 Sy1 01 34 16.9070384920 -42 58 26.220856306   18.17 17.30 16.71   ~ 65 0
13 2XMM J013955.7+061922 Sy1 01 39 55.7698488494 +06 19 22.518916337   16.80 17.00     ~ 153 0
14 2MASS J01482232-2758257 Sy1 01 48 22.3290197015 -27 58 25.631437311   17.72 15.0 16.37   ~ 29 0
15 RX J0152.4-2319 Sy1 01 52 27.0844991894 -23 19 53.628308440   17.39 15.6 16.18   ~ 24 0
16 Mrk 1044 Sy1 02 30 05.5224714146 -08 59 53.208069457   14.74 14.29 13.981 13.585 ~ 219 0
17 NGC 985 Sy1 02 34 37.882 -08 47 17.02   14.64 14.28 12.9   ~ 346 0
18 RX J0311.3-2046 Sy1 03 11 18.8103293782 -20 46 18.139567365   16.97 16.47 15.82   ~ 32 0
19 2MASX J03194856-2627132 Sy1 03 19 48.5579204938 -26 27 12.764361471   12.5 15.9 12.3   ~ 24 0
20 2MASX J03231532-4931064 Sy1 03 23 15.2954486365 -49 31 06.105774655   16.62 16.5 15.57   ~ 36 0
21 FRL 1106 Sy1 03 25 02.2746496866 -41 54 17.624238173   15.37 15.43 15.20   ~ 25 1
22 6dFGS gJ033340.2-370655 Sy1 03 33 40.1725210995 -37 06 54.214814054   15.5 16.1 15.4   ~ 22 0
23 6dFGS gJ034907.7-471104 Sy1 03 49 07.7092693675 -47 11 04.119751444   18.29 16.8 17.01   ~ 14 0
24 FRL 1116 Sy1 03 51 41.6987614546 -40 27 59.268394423   15.10 14.67 12.1   ~ 61 0
25 ESO 359-19 Sy1 04 05 01.6844711014 -37 11 15.047299096   15.24   14.96   ~ 35 0
26 2MASS J04124148-4712461 Sy1 04 12 41.4855735842 -47 12 46.018105223 14.96 15.78 15.42     ~ 16 0
27 LB 1727 Sy1 04 26 00.7188445954 -57 12 01.772037544 13.68 14.58 14.37 14.8   ~ 235 0
28 FRL 303 Sy1 04 30 40.0330092385 -53 36 55.649189836 15.90 16.00 15.6 12.4   ~ 46 0
29 2MAXI J0439-468 Sy1 04 37 28.1558173753 -47 11 29.480246524 14.68 16.61 14.95 15.43   ~ 68 0
30 [VV98] J043938.7-531131 Sy1 04 39 38.7158844487 -53 11 31.246585806     16.2     ~ 34 0
31 2MAXI J0442-271 Sy1 04 41 22.5336332447 -27 08 19.332322391 15.48 16.09 15.32 14.6   ~ 47 0
32 [VV2006] J061549.7-582605 QSO 06 15 49.5808359273 -58 26 05.249723253   16.93   15.85   ~ 16 0
33 2MASX J08590289+4846093 Sy1 08 59 02.8979809285 +48 46 09.343721004   15.49 15.31     ~ 19 0
34 2MASX J09023358-0700041 AGN 09 02 33.5678624813 -07 00 04.323768588   17.70   16.72   ~ 17 0
35 Mrk 110 Sy1 09 25 12.8479868736 +52 17 10.386808297   16.82 16.41     ~ 510 0
36 PG 0953+414 Sy1 09 56 52.3930851607 +41 15 22.212153978 14.710 15.611 15.546 15.294 14.720 ~ 413 0
37 2MASSI J1005418+433240 Sy1 10 05 41.8619295274 +43 32 40.446116728   17.09 16.89     ~ 74 0
38 [VV2006c] J100710.2+220302 Sy1 10 07 10.13 +22 03 14.6     17.0     ~ 16 0
39 Ton 1187 Sy1 10 13 03.1812987700 +35 51 23.744219932   15.60 15.42     ~ 75 0
40 2MASS J10190046+3752403 Sy1 10 19 00.4587814644 +37 52 40.550918020   18.84 18.31     ~ 23 0
41 Mrk 141 Sy1 10 19 12.5634677324 +63 58 02.618352314   16.32 16.00     ~ 135 0
42 Mrk 142 Sy1 10 25 31.2788890554 +51 40 34.868795739   16.33 16.12     ~ 232 0
43 7C 103144.10+395402.00 Sy1 10 34 38.5975589813 +39 38 28.181434249   17.37 16.90     ~ 303 1
44 2MASS J11171007+6522073 Sy1 11 17 10.0678479110 +65 22 07.230358535   16.8 16.4     ~ 26 0
45 2MASSI J1118302+402553 Sy1 11 18 30.2896275867 +40 25 54.069567643   16.34 16.21     ~ 191 0
46 Ton 1388 Sy1 11 19 08.6786143504 +21 19 17.986556889   14.91 14.80     ~ 414 0
47 2MASX J11310476+6851528 Sy1 11 31 04.7646709179 +68 51 52.997211690   16.17 15.27     ~ 31 0
48 Ton 580 Sy1 11 31 09.4822135528 +31 14 05.506427771   16.22 16.05 15.8   ~ 129 1
49 2MASX J11384966+5742437 Sy1 11 38 49.6019975288 +57 42 43.533935589   18.07 17.75     ~ 39 0
50 MCG+06-26-012 Sy1 11 39 13.9164485223 +33 55 51.138959033   17.38 16.98     ~ 82 0
51 2MASX J11411613+2156214 Sy1 11 41 16.1617794746 +21 56 21.650276367   16.94 16.81     ~ 59 0
52 2MASX J11442989+3653085 Sy1 11 44 29.8708446823 +36 53 08.615386681   16.26 15.49     ~ 63 0
53 Ton 1460 HS* 11 53 58.8152982846 +35 39 29.111822454   16.27       sdB 16 0
54 Mrk 1310 Sy1 12 01 14.3544471268 -03 40 41.022042039   16.31 15.89 14.780   ~ 144 0
55 NGC 4051 Sy1 12 03 09.6098828919 +44 31 52.693714606   11.08 12.92 9.94   ~ 1992 1
56 2E 2584 Sy1 12 04 42.1097577213 +27 54 11.867990165   15.64 15.60     ~ 351 0
57 2E 2598 Sy1 12 09 45.2141873217 +32 17 01.100656246   17.80 17.58     ~ 40 0
58 PB 3894 Sy1 12 14 17.6737003918 +14 03 13.182526431   14.46 14.19     ~ 739 0
59 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 931 1
60 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5320 1
61 2MASS J12313656+7044144 Sy1 12 31 36.5587967928 +70 44 14.354955852     15.66     ~ 42 0
62 Mrk 771 Sy1 12 32 03.6224248141 +20 09 29.495841579   15.57 15.30     ~ 432 0
63 MCG+08-23-067 Sy1 12 36 51.1757573584 +45 39 04.185938584   17.64 17.16     ~ 51 0
64 IC 3599 Sy1 12 37 41.1939866364 +26 42 27.492074834   15.7 16.5     ~ 154 0
65 NGC 4593 Sy1 12 39 39.4435521178 -05 20 39.035028119   13.95 13.15     ~ 950 0
66 3XMM J124210.6+331702 Sy1 12 42 10.6050859940 +33 17 02.664455978   16.45 15.65     ~ 97 0
67 LBQS 1244+0238 Sy1 12 46 35.2527388863 +02 22 08.784237661   16.57 16.37     ~ 254 0
68 2MASS J13041699+0205369 Sy1 13 04 16.9955586038 +02 05 37.010915804   17.71 17.43     ~ 43 0
69 2E 2978 Sy1 13 09 47.0029670396 +08 19 48.215010428   16.04 15.89     ~ 342 0
70 Ton 1571 Sy1 13 14 22.6993309868 +34 29 38.489540703   16.93 16.74     ~ 24 0
71 2MASS J13195706+5235338 Sy1 13 19 57.0704936832 +52 35 33.712791687   18.40 17.94     ~ 28 0
72 2XMM J132349.6+654148 Sy1 13 23 49.5183330047 +65 41 48.166159616   16.01 15.84     ~ 154 0
73 2MASX J13251937-3824524 Sy1 13 25 19.3805503234 -38 24 52.611897329   16.64 13.80 15.33   ~ 339 0
74 2RE J1337+244 Sy1 13 37 18.7198121988 +24 23 03.320690345     15.0     ~ 358 0
75 Ton 730 Sy1 13 43 56.7433437047 +25 38 47.639948043   16.48 16.6     ~ 103 0
76 2MASX J13551655+5612451 Sy1 13 55 16.5546440461 +56 12 44.628621988   17.38 17.09     ~ 60 0
77 Ton 182 Sy1 14 05 16.2180155773 +25 55 34.116787862   15.42 15.34     ~ 231 0
78 2MASX J14133671+7029501 Sy1 14 13 36.7140452157 +70 29 50.446750041     16.9     ~ 18 0
79 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2393 0
80 QSO B1421-0013 QSO 14 24 03.8058913616 -00 26 58.007845485   16.49 16.16     ~ 20 0
81 Mrk 813 Sy1 14 27 25.0494164803 +19 49 52.267903001   15.42 15.27     ~ 68 0
82 Mrk 684 Sy1 14 31 04.7823224993 +28 17 14.127794327   15.36 14.68     ~ 86 0
83 Mrk 478 Sy1 14 42 07.4713423763 +35 26 22.939531895   14.91 14.58     ~ 484 0
84 2MASX J14510879+2709272 Sy1 14 51 08.7649690311 +27 09 26.964855405   15.01 15.01     ~ 154 0
85 Mrk 841 Sy1 15 04 01.1935077982 +10 26 15.778741853   14.50 14.27     ~ 584 0
86 2MASSI J1529074+561606 Sy1 15 29 07.4565805305 +56 16 06.736536125   16.90 16.74     ~ 37 0
87 Mrk 493 Sy1 15 59 09.6228325606 +35 01 47.568001984   15.69 15.06     ~ 263 0
88 Mrk 876 Sy1 16 13 57.1791807197 +65 43 09.953889666   16.03 15.49     ~ 512 0
89 2MASX J16175244+0604180 Sy1 16 17 52.449 +06 04 18.02   15.66 15.7     ~ 59 0
90 2MASX J16180940+3619580 Sy1 16 18 09.3738286242 +36 19 57.879761949   17.63 17.09     ~ 38 0
91 2MASX J16195129+4058472 Sy1 16 19 51.3111911785 +40 58 47.320549097   17.81 17.34     ~ 54 0
92 2MASS J16245659+7554560 BLL 16 24 56.5714665760 +75 54 55.978646466     16.60     ~ 51 0
93 QSO B1626+5529 Sy1 16 27 56.1124169072 +55 22 31.559608363   15.79 15.68     ~ 188 0
94 2MASS J16290130+4007599 Sy1 16 29 01.3106183526 +40 07 59.907182858   18.23 18.00 17.2   ~ 98 0
95 2MASSI J1702310+324719 Sy1 17 02 31.0622384749 +32 47 19.646117689   16.19 15.98     ~ 60 0
96 Mrk 1513 Sy1 21 32 27.8163185343 +10 08 19.250705656   14.92 14.64     ~ 539 0
97 2MASX J21463604-3051402 Sy1 21 46 36.0636722887 -30 51 40.493435316   17.084   16.959   ~ 20 0
98 ESO 404-29 Sy1 22 07 45.0230363061 -32 35 01.582300938   15.52 15.32 15.18   ~ 24 0
99 NGC 7214 Sy1 22 09 07.6626319170 -27 48 34.155863437   12.48 14.10 11.40   ~ 121 0
100 RX J2216.9-4451 Sy1 22 16 53.2184927992 -44 51 56.951477772   17.80 15.8 16.25   ~ 25 1
101 6dFGS gJ221756.6-594130 Sy1 22 17 56.6561264472 -59 41 30.817920584 16.30 17.08 16.78 16.80   ~ 41 0
102 QSO B2227-399 QSO 22 30 40.2791607315 -39 42 52.055208460   17.87 18.5 15.73   ~ 87 1
103 6dFGS gJ224237.7-384516 Sy1 22 42 37.6890961362 -38 45 16.299296454   18.50 16.9 17.05   ~ 17 0
104 2MASS J22452029-4652116 Sy1 22 45 20.3094 -46 52 11.796     14.8     ~ 26 0
105 2MASS J22484115-5109532 Sy1 22 48 41.1703517984 -51 09 53.324132792   15.60 15.43 15.5   ~ 64 0
106 2MASX J22573900-3656063 Sy1 22 57 39.0247421955 -36 56 06.521071890   16.59 16.0 15.64   ~ 55 0
107 2MASX J22584540-2609138 Sy1 22 58 45.3697151664 -26 09 14.183968567   17.31 16.1 16.14   ~ 18 0
108 2MAXI J2301-591 Sy1 23 01 36.2303063047 -59 13 21.086895470   17.88   16.20   ~ 24 0
109 6dFGS gJ230152.0-550831 Sy1 23 01 52.0210261721 -55 08 30.863529439   17.24 15.4 16.08   ~ 24 0
110 2dFGRS TGS538Z275 Sy1 23 04 37.4064781520 -35 01 13.589474270   16.755 16.6 15.558   ~ 15 0
111 6dFGS gJ231234.8-340420 Sy1 23 12 34.7719028199 -34 04 20.168271933   17.95 17.20 16.73   ~ 18 1
112 2MASX J23174996-4422275 Sy1 23 17 49.9494788280 -44 22 27.802516393   17.96 16.8 16.84   ~ 20 0
113 2MASS J23251179-3236346 Sy1 23 25 11.7928414356 -32 36 34.545528118   18.12 17.0 17.02   ~ 17 1
114 2MASX J23252420-3826492 Sy1 23 25 24.1872124880 -38 26 49.188771220   14.84 14.24     ~ 44 0
115 2E 4755 Sy1 23 43 28.5430003224 -14 55 30.610389619   17.45 15.91 16.50   ~ 37 0
116 2MASX J23492400-3126028 Sy1 23 49 24.0315 -31 26 02.559   16.864 16.6 15.687   ~ 21 0
117 MCG-05-01-012 PaG 23 57 26.7 -30 27 33   15.12       ~ 23 0
118 MCG-05-01-013 Sy1 23 57 28.0468324478 -30 27 40.507485346   10.7 11.27 10.2   ~ 23 0

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2020.07.13-23:28:22

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